'Black widow' bomber attacks Russia police
25 May 2013 Last updated at 17:32 BST
A suicide bomber has blown herself up in the capital of the troubled southern republic of Dagestan, Makhachkala, officials say.
Fifteen people including five policemen were wounded in the attack, close to an interior ministry building.
Some of the victims were seriously hurt and at least one of the police officers was in a critical condition.
In recent years, Russia has seen a number of attacks by women suicide bombers, known as black widows.
They are often related to Islamist militants killed during a separatist campaign against Russia, particularly in the North Caucasus.